CN212246911U - Waste mineral oil regeneration production line - Google Patents
Waste mineral oil regeneration production line Download PDFInfo
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- CN212246911U CN212246911U CN202020967408.7U CN202020967408U CN212246911U CN 212246911 U CN212246911 U CN 212246911U CN 202020967408 U CN202020967408 U CN 202020967408U CN 212246911 U CN212246911 U CN 212246911U
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Abstract
A waste mineral oil regeneration production line comprises a flash tower, a first heating furnace, a primary distillation tower, a second heating furnace and a secondary distillation tower which are arranged in sequence; the flash tower is connected with a waste mineral oil inlet pipe, the top of the flash tower is provided with a flash gas outlet pipe, and the flash gas outlet pipe is connected with an oil-water separator; the bottom of the flash tower is provided with a flash oil outlet, the flash oil outlet is connected with a first oil pipeline and a first oil pump, and the output end of the first oil pipeline is connected with the first heating furnace. The production line of the utility model greatly reduces the molecular cracking phenomenon, and the yield can be improved by one percent to three percent by using the process technology for the same raw material. Through input natural gas in primary distillation tower and secondary distillation tower, the noncondensable mist after natural gas and waste oil flash distillation gets back to the heating furnace together and burns, can effectively get rid of foul smell gas, improves the quality of product.
Description
Technical Field
The utility model relates to a waste mineral oil regeneration field, concretely relates to waste mineral oil regeneration production line.
Background
In most of the regeneration process technologies of waste mineral oil, the waste mineral oil is heated once and enters a fractionating tower at high temperature for fractionation, so that the oil molecules are cracked to generate a large amount of non-condensable gas and fuel oil components, and the yield of the lubricating oil with high viscosity is reduced. At present, in the regeneration process of waste mineral oil, the odor generated in the mineral oil is difficult to remove, so that the product has certain peculiar smell, and the quality of the product is directly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a waste mineral oil regeneration production line to above-mentioned defect exactly.
The utility model comprises a flash tower, a first heating furnace, a primary distillation tower, a second heating furnace and a secondary distillation tower which are arranged in sequence;
the flash tower is connected with a waste mineral oil inlet pipe, the top of the flash tower is provided with a flash gas outlet pipe, and the flash gas outlet pipe is connected with an oil-water separator; a flash evaporation oil outlet is formed in the bottom of the flash evaporation tower, a first oil pipeline and a first oil pump are connected to the flash evaporation oil outlet, and the output end of the first oil pipeline is connected with the first heating furnace;
the outlet end of the first heating furnace is connected to the feed inlet of the primary distillation tower through a pipeline, the top of the primary distillation tower is connected with an oil-gas separator through a pipeline, the bottom of the primary distillation tower is connected with a second oil pipeline and a second oil pump, and the output end of the second oil pipeline is connected with the second heating furnace;
the outlet end of the second heating furnace is connected to the secondary distillation tower through a pipeline, a first heat exchanger and a second heat exchanger are respectively arranged at the lower part and the upper part of the secondary distillation tower, and the top of the secondary distillation tower is connected to the oil-gas separator through a pipeline;
the bottom of the secondary distillation tower is connected with an oil return pipeline, a third heat exchanger and a third oil pump are arranged on the oil return pipeline, and the tail end of the oil return pipeline is connected to the bottom of the flash tower;
the first heating furnace and the second heating furnace are both tube type heating furnaces; the combustion opening of the tubular heating furnace is provided with a fire cover, the fire cover comprises an inner cover body and an outer cover body, one end of the inner cover body and one end of the outer cover body are open, the inner cover body and the outer cover body are respectively provided with holes, and the open ends of the inner cover body and the outer cover body are fixed at the combustion opening of the tubular heating furnace and are positioned in the tubular heating furnace; the holes on the inner layer cover body and the outer layer cover body are distributed in a staggered manner and form a plurality of bent hot air flow channels; a high-temperature-resistant temperature detection probe for detecting the temperature in the furnace body is also arranged in the furnace body of the tubular heating furnace;
the lower parts of the primary distillation tower and the secondary distillation tower are both provided with natural gas inlet pipes, natural gas flow equalizing pipes communicated with the natural gas inlet pipes are arranged inside the primary distillation tower and the secondary distillation tower, and a plurality of groups of gas outlets are arranged on the pipe walls of the natural gas flow equalizing pipes in an annular array;
and a gas outlet of the oil-gas separator is connected with a natural gas guide pipe, and the tail end of the natural gas guide pipe is communicated with a burner of the second heating furnace and supplies recovered combustible gas to the burner of the second heating furnace.
The heating temperature of the first heating furnace is 340 ℃.
The heating temperature of the second heating furnace is 370 ℃.
The oil-gas separator is connected with a base oil storage tank.
The inner layer cover body and the outer layer cover body are both made of silicon steel plates.
The utility model has the advantages that: in the regeneration process technology of waste mineral oil, most processes are that oil molecules are cracked to produce a large amount of non-condensable gas and fuel oil components by one-time heating and high temperature fractionation in a fractionating tower to cause over temperature, so that the yield of high-viscosity lubricating oil is reduced, and in order to improve the yield of lubricating oil base oil in waste oil, through multiple research and development and reconstruction, the non-cracking temperature is used to be lower than 340 ℃ and about 370 ℃ as much as possible by adopting sub-tower extraction, so that the molecular cracking phenomenon is greatly reduced, and the yield can be improved by one percent to three percent by using the process technology for the same raw material. Through input natural gas in primary distillation tower and secondary distillation tower, the noncondensable mist after natural gas and waste oil flash distillation gets back to the heating furnace together and burns, can effectively get rid of foul smell gas, improves the quality of product.
Description of the drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic sectional view of a tube-type heating furnace.
Fig. 3 is a schematic half sectional view of the outer shell.
Fig. 4 is a schematic diagram of a natural gas inlet pipe and a natural gas flow equalizing pipe structure.
Detailed Description
As shown in the attached drawing, the utility model comprises a flash tower 1, a first heating furnace 2, a primary distillation tower 3, a second heating furnace 4 and a secondary distillation tower 5 which are arranged in sequence;
the flash tower 1 is connected with a waste mineral oil inlet pipe 6, the top of the flash tower 1 is provided with a flash evaporation gas outlet pipe 7, and the flash evaporation gas outlet pipe 7 is connected with an oil-water separator 8; a flash oil outlet is formed in the bottom of the flash tower 1 and is connected with a first oil pipeline 9 and a first oil pump 10, and the output end of the first oil pipeline 9 is connected with the first heating furnace 2;
the outlet end of the first heating furnace 2 is connected to the feed inlet of the primary distillation tower 3 through a pipeline, the top of the primary distillation tower 3 is connected with an oil-gas separator 11 through a pipeline, the bottom of the primary distillation tower 3 is connected with a second oil pipeline 12 and a second oil pump 13, and the output end of the second oil pipeline 12 is connected with the second heating furnace 4;
the outlet end of the second heating furnace 4 is connected to the secondary distillation tower 5 through a pipeline, the lower part and the upper part of the secondary distillation tower 5 are respectively provided with a first heat exchanger 14 and a second heat exchanger 15, and the top of the secondary distillation tower 5 is connected to the oil-gas separator 11 through a pipeline;
the bottom of the secondary distillation tower 5 is connected with an oil return pipeline 16, a third heat exchanger 17 and a third oil pump 18 are arranged on the oil return pipeline 16, and the tail end of the oil return pipeline 16 is connected to the bottom of the flash tower 1;
wherein, the first heating furnace 2 and the second heating furnace 4 are both tube type heating furnaces; the combustion opening of the tubular heating furnace is provided with a fire cover, the fire cover comprises an inner cover body 22 and an outer cover body 23, one ends of the inner cover body 22 and the outer cover body 23 are open, the inner cover body 22 and the outer cover body 23 are respectively provided with holes, and the open ends of the inner cover body 22 and the outer cover body 23 are fixed at the combustion opening of the tubular heating furnace and are positioned in the tubular heating furnace; the holes on the inner layer cover body 22 and the outer layer cover body 23 are distributed in a staggered manner and form a plurality of bent hot air flow channels; a high-temperature-resistant temperature detection probe for detecting the temperature in the furnace body is also arranged in the furnace body of the tubular heating furnace;
the lower parts of the primary distillation tower 3 and the secondary distillation tower 5 are both provided with natural gas inlet pipes 24, natural gas flow equalizing pipes 25 communicated with the natural gas inlet pipes 24 are arranged inside the primary distillation tower 3 and the secondary distillation tower 5, and a plurality of groups of gas outlets 26 are annularly arrayed on the pipe walls of the natural gas flow equalizing pipes 25;
and a gas outlet of the oil-gas separator 11 is connected with a natural gas guide pipe 27, and the tail end of the natural gas guide pipe 27 is communicated with a burner of the second heating furnace 4 and supplies recovered combustible gas to the burner of the second heating furnace 4.
The heating temperature of the first heating furnace 2 is 340 ℃.
The heating temperature of the second heating furnace 4 is 370 ℃.
The oil-gas separator 11 is connected with a base oil storage tank.
The inner layer cover body 22 and the outer layer cover body 23 are both made of silicon steel plates.
The working principle is as follows: waste mineral oil enters a flash evaporation tower through a waste mineral oil inlet pipe to be flashed and then is discharged from a top flash evaporation gas outlet pipe, an oil-water separator on the flash evaporation gas outlet pipe separates oil and water and then recovers, the bottom of the flash evaporation tower inputs the residual oil into a first heating furnace through a first oil pipeline and a first oil pump, the residual oil is heated to 340 ℃ and then is sent to a primary distillation tower, natural gas is introduced at the same time, and the top of the primary distillation tower separates the oil from the gas through an oil-gas separator connected with the pipeline; the bottom of the primary distillation tower is connected to a second heating furnace through a second oil pipeline and a second oil pump, the rest oil phase is heated to 370 ℃ and then is sent to a secondary distillation tower, natural gas is introduced at the same time, and the top of the secondary distillation tower is connected to the oil-gas separator through a pipeline to separate oil and gas; the gas separated by the oil-gas separator is led into a burner of the second heating furnace through a natural gas guide tube for recycling; and the bottom of the secondary distillation tower returns the residual oil to the flash tower after being properly cooled through an oil return pipeline, a third heat exchanger and a third oil pump, so that the operation is repeated again, and the yield is improved. The double-layer punching is made of 850 ℃ silicon steel plates by using ultra-high temperature resistant plates in the tube furnace, so that inner layer cover body holes are staggered with outer layer cover body holes, flame and light radiation of a burner cannot emerge from the outer cover holes, and only hot air flows out through a hot air flow channel, thus the temperature normality in the furnace hearth is subjected to flat and constant heat transfer in a hot air environment, the overheating of partial sections of a furnace tube is avoided, and the whole furnace is heated uniformly. Through input natural gas in primary distillation tower and secondary distillation tower, the noncondensable mist after natural gas and waste oil flash distillation gets back to the heating furnace together and burns, can effectively get rid of foul smell gas, improves the quality of product. The fractional extraction is adopted to use the cracking temperature of less than 340 ℃ and about 370 ℃ as much as possible, so that the molecular cracking phenomenon is greatly reduced, and the yield of the same raw material can be improved by one percent to three percent by using the process technology.
Claims (5)
1. A waste mineral oil regeneration production line is characterized by comprising a flash tower (1), a first heating furnace (2), a primary distillation tower (3), a second heating furnace (4) and a secondary distillation tower (5) which are arranged in sequence;
the waste mineral oil inlet pipe (6) is connected to the flash tower (1), the flash gas outlet pipe (7) is arranged at the top of the flash tower (1), and the oil-water separator (8) is connected to the flash gas outlet pipe (7); the bottom of the flash tower (1) is provided with a flash oil outlet, the flash oil outlet is connected with a first oil pipeline (9) and a first oil pump (10), and the output end of the first oil pipeline (9) is connected with the first heating furnace (2);
the outlet end of the first heating furnace (2) is connected to the feed inlet of the primary distillation tower (3) through a pipeline, the top of the primary distillation tower (3) is connected with an oil-gas separator (11) through a pipeline, the bottom of the primary distillation tower (3) is connected with a second oil pipeline (12) and a second oil pump (13), and the output end of the second oil pipeline (12) is connected with the second heating furnace (4);
the outlet end of the second heating furnace (4) is connected to the secondary distillation tower (5) through a pipeline, a first heat exchanger (14) and a second heat exchanger (15) are respectively arranged at the lower part and the upper part of the secondary distillation tower (5), and the top of the secondary distillation tower (5) is connected to the oil-gas separator (11) through a pipeline;
the bottom of the secondary distillation tower (5) is connected with an oil return pipeline (16), a third heat exchanger (17) and a third oil pump (18) are arranged on the oil return pipeline (16), and the tail end of the oil return pipeline (16) is connected to the bottom of the flash tower (1);
wherein the first heating furnace (2) and the second heating furnace (4) are both tubular heating furnaces; the combustion opening of the tubular heating furnace is provided with a fire cover, the fire cover comprises an inner cover body (22) and an outer cover body (23), one ends of the inner cover body (22) and the outer cover body (23) are open, holes are respectively arranged on the inner cover body (22) and the outer cover body (23), and the open ends of the inner cover body (22) and the outer cover body (23) are fixed at the combustion opening of the tubular heating furnace and are positioned in the tubular heating furnace; the holes on the inner layer cover body (22) and the outer layer cover body (23) are distributed in a staggered manner and form a plurality of bent hot air flow channels; a high-temperature-resistant temperature detection probe for detecting the temperature in the furnace body is also arranged in the furnace body of the tubular heating furnace;
the lower parts of the primary distillation tower (3) and the secondary distillation tower (5) are respectively provided with a natural gas inlet pipe (24), natural gas flow equalizing pipes (25) communicated with the natural gas inlet pipes (24) are arranged inside the primary distillation tower (3) and the secondary distillation tower (5), and a plurality of groups of gas outlets (26) are arranged on the pipe walls of the natural gas flow equalizing pipes (25) in an annular array manner;
and a gas outlet of the oil-gas separator (11) is connected with a natural gas guide pipe (27), and the tail end of the natural gas guide pipe (27) is communicated with a burner of the second heating furnace (4) and supplies recovered combustible gas to the burner of the second heating furnace (4).
2. The waste mineral oil recycling line according to claim 1, wherein the heating temperature of said first heating furnace (2) is 340 ℃.
3. The used mineral oil recycling line according to claim 1, wherein the heating temperature of said second heating furnace (4) is 370 ℃.
4. The waste mineral oil recycling production line according to claim 1, characterized in that the oil-gas separator (11) is connected with a base oil storage tank.
5. The waste mineral oil recycling production line of claim 1, wherein the inner cover (22) and the outer cover (23) are made of silicon steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020967408.7U CN212246911U (en) | 2020-06-01 | 2020-06-01 | Waste mineral oil regeneration production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020967408.7U CN212246911U (en) | 2020-06-01 | 2020-06-01 | Waste mineral oil regeneration production line |
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| Publication Number | Publication Date |
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| CN212246911U true CN212246911U (en) | 2020-12-29 |
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| CN202020967408.7U Active CN212246911U (en) | 2020-06-01 | 2020-06-01 | Waste mineral oil regeneration production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111423906A (en) * | 2020-06-01 | 2020-07-17 | 河北车迪石油化工有限公司 | Waste mineral oil regeneration production line and process thereof |
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2020
- 2020-06-01 CN CN202020967408.7U patent/CN212246911U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111423906A (en) * | 2020-06-01 | 2020-07-17 | 河北车迪石油化工有限公司 | Waste mineral oil regeneration production line and process thereof |
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